<template>
	<div>
		<!-- 面包屑导航区 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>权限管理</el-breadcrumb-item>
			<el-breadcrumb-item>角色列表</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 卡片视图 -->
		<el-card>
			<!-- 添加角色按钮 -->
			<el-row>
				<el-col>
					<el-button type="primary" @click="AddRoleDialogVisible=true">添加角色</el-button>
				</el-col>
			</el-row>
			<!-- 角色列表 -->
			<el-table :data="rolesList" border stripe>
				<!-- 展开列 -->
				<el-table-column type="expand">
					<template slot-scope="scope">
						<el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
							<!-- 一级权限 -->
							<el-col :span="5">
								<el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName}}</el-tag>
								<i class="el-icon-caret-right"></i>
							</el-col>
							<!-- 二级和三级 -->
							<el-col :span="19">
							<!-- 通过for循环 渲染二级权限 -->
								<el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
									<el-col :span="6 ">
										<el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
										<i class="el-icon-caret-right"></i>
									</el-col>
									<el-col :span="18">
										<el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{ item3.authName}}</el-tag>
									</el-col>
								</el-row>
							</el-col>
						</el-row>
					</template>
				</el-table-column>
				<!-- 索引列 -->
				<el-table-column type="index" label="#"></el-table-column>
				<el-table-column label="角色名称" prop="roleName"></el-table-column>
				<el-table-column label="角色描述" prop="roleDesc"></el-table-column>
				<el-table-column label="操作" width="300px">
					<template slot-scope="scope">
						<el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
						<el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
						<el-button type="wa rning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
					</template>
				</el-table-column>
			</el-table>
		</el-card>
		<!-- 分配权限 -->
		<el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
			<!-- 树形控件 -->
			<el-tree :data="rightsList" :props="treeProps" ref="treeRef" show-checkbox node-key="id" default-expand-all
			 :default-checked-keys="defKeys"></el-tree>
			<span slot="footer" class="dialog-footer">
				<el-button @click="setRightDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="allotRights">确 定</el-button>
			</span>
		</el-dialog>
		<!-- 添加角色对话框 -->
		<el-dialog title="添加角色" :visible.sync="AddRoleDialogVisible" width="40%" @close="addRoleDialogClosed">
			
			<el-form :model="addRoleForm" ref="addRoleFormRef" :rules="addRoleFormRules" label-width="100px">
				<el-form-item label="角色名称" prop="roleName">
					<el-input v-model="addRoleForm.roleName"></el-input>
				</el-form-item>
				<el-form-item label="角色描述" prop="roleDesc">
					<el-input v-model="addRoleForm.roleDesc"></el-input>
				</el-form-item>
			</el-form>
			<span slot="footer" class="dialog-footer">
				<el-button @click="AddRoleDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="addRoles">确 定</el-button>
			</span>
		</el-dialog>
		<!-- 编辑角色对话框 -->
		<el-dialog title="编辑角色" :visible.sync="editRoleDialogVisible" width="40%" @close="addRoleDialogClosed">
			<el-form :model="editRoleForm" ref="editRoleFormRef" :rules="editRoleFormRules" label-width="100px">
				<el-form-item label="角色名称" prop="roleName">
					<el-input v-model="editRoleForm.roleName"></el-input>
				</el-form-item>
				<el-form-item label="角色描述" prop="roleDesc">
					<el-input v-model="editRoleForm.roleDesc"></el-input>
				</el-form-item>
			</el-form>
			<span slot="footer" class="dialog-footer">
				<el-button @click="editRoleDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="editRoles">确 定</el-button>
			</span>
		</el-dialog>
	</div>
</template>
<script>
	export default {
		data() {
			return {
				// 所有角色列表
				rolesList: [],
				// 分配权限框
				setRightDialogVisible: false,
				// 权限列表
				rightsList: [],
				//  树形控件的属性绑定对象
				treeProps: {
					label: 'authName',
					children: 'children'
				},
				//   默认选中节点ID值
				defKeys: [],
				//   添加用户对话框
				AddRoleDialogVisible: false,
				// 添加角色表单
				addRoleForm: {},
				//   添加角色表单验证
				addRoleFormRules: {
					roleName: [
						{
							required: true,
							message: '请输入角色名称',
							trigger: 'blur'
						}
					],
					roleDesc: [
						{
							required: true,
							message: '请输入角色描述',
							trigger: 'blur'
						}
					]
				},
				//   编辑角色信息
				editRoleForm: {},
				editRoleDialogVisible: false,
				editRoleFormRules: {
					roleName: [
						{
							required: true,
							message: '请输入角色名称',
							trigger: 'blur'
						}
					],
					roleDesc: [
						{
							required: true,
							message: '请输入角色描述',
							trigger: 'blur'
						}
					]
				},
				//   当前即将分配权限的Id
				roleId: 0,
				}
		},
		created() {
			this.getRolesList()
		},
		methods: {
			async getRolesList() {
				const {
					data: res
				} = await this.$http.get('roles')
				if (res.meta.status !== 200) {
					return this.$message.error('获取角色列表失败！')
				}
				this.rolesList = res.data
			},
			// 根据ID删除对应的权限
			async removeRightById(role, rightId) {
				// 弹框提示 删除
				const confirmResult = await this.$confirm(
					'此操作将永久删除该权限, 是否继续?',
					'提示', {
						confirmButtonText: '确定',
						cancelButtonText: '取消',
						type: 'warning'
					}
				).catch(err => err)
				// 点击确定 返回值为：confirm
				// 点击取消 返回值为： cancel
				if (confirmResult !== 'confirm') {
					return this.$message.info('已取消权限删除')
				}
				const {
					data: res
				} = await this.$http.delete(
					`roles/${role.id}/rights/${rightId}`
				)
				if (res.meta.status !== 200) {
					return this.$message.error('删除权限失败！')
				}
				role.children = res.data
				//   不建议使用
				// this.getRolesList()
			},
			// 分配权限
			async showSetRightDialog(role) {
				this.roleId = role.id

				// 获取角色的所有权限
				const {
					data: res
				} = await this.$http.get('rights/tree')
				if (res.meta.status !== 200) {
					return this.$message.error('获取权限数据失败！')
				}
				//   获取权限树
				this.rightsList = res.data
				//   console.log(res)
				//   递归获取三级节点的id
				this.getLeafkeys(role, this.defKeys)

				this.setRightDialogVisible = true
			},
			// 通过递归 获取角色下三级权限的 id, 并保存到defKeys数组
			getLeafkeys(node, arr) {
				// 没有children属性，则是三级节点
				if (!node.children) {
					return arr.push(node.id)
				}
				node.children.forEach(item => this.getLeafkeys(item, arr))
			},
			// 权限对话框关闭事件
			setRightDialogClosed() {
				this.defKeys = []
			},
			// 添加角色对话框的关闭
			addRoleDialogClosed() {
				this.$refs.addRoleFormRef.resetFields()
			},
			// 添加角色
			addRoles() {
				this.$refs.addRoleFormRef.validate(async valid => {
					if (!valid) return
					const {
						data: res
					} = await this.$http.post('roles', this.addRoleForm)
					if (res.meta.status !== 201) {
						this.$message.error('添加角色失败！')
					}
					this.$message.success('添加角色成功！')
					this.AddRoleDialogVisible = false
					this.getRolesList()
				})
			},
			// 删除角色
			async removeRoleById(id) {
				const confirmResult = await this.$confirm(
					'此操作将永久删除该角色, 是否继续?',
					'提示',
					{
						confirmButtonText: '确定',
						cancelButtonText: '取消',
					type: 'warning'
					}
				).catch(err => err)
				if (confirmResult !== 'confirm') {
					return this.$message.info('已取消删除')
				}
				const {
					data: res
				} = await this.$http.delete('roles/' + id)
				if (res.meta.status !== 200) return this.$message.error('删除角色失败！')
				this.$message.success('删除用户成功！')
				this.getRolesList()
			},
			// 编辑角色
			async showEditDialog(id) {
				const {
					data: res
				} = await this.$http.get('roles/' + id)
				if (res.meta.status !== 200) return this.$message.error('查询角色信息失败！')
				this.editRoleForm = res.data
				this.editRoleDialogVisible = true
			},
			editRoles() {
				this.$refs.editRoleFormRef.validate(async valid => {
					// console.log(valid)
					// 表单预校验失败
					if (!valid) return
					const {
						data: res
					} = await this.$http.put(
						'roles/' + this.editRoleForm.roleId, {
							roleName: this.editRoleForm.roleName,
							roleDesc: this.editRoleForm.roleDesc
						}
					)
					if (res.meta.status !== 200) {
						this.$message.error('更新角色信息失败！')
					}
					// 隐藏编辑角色对话框
					this.editRoleDialogVisible = false
					this.$message.success('更新角色信息成功！')
					this.getRolesList()
				})
			},
			// 分配权限
			async allotRights(roleId) {
				// 获得当前选中和半选中的Id
				const keys = [
					...this.$refs.treeRef.getCheckedKeys(),
					...this.$refs.treeRef.getHalfCheckedKeys()
				]
				// join() 方法用于把数组中的所有元素放入一个字符串
				const idStr = keys.join(',')
				const {
					data: res
				} = await this.$http.post(`roles/${this.roleId}/rights`, {
					rids: idStr
				})
				if (res.meta.status !== 200) {
					return this.$message.error('分配权限失败！')
				}
				this.$message.success('分配权限成功!')
				this.getRolesList()
				this.setRightDialogVisible = false
			}
		}
	}
</script>
<style Lang="less" scoped>
	.el-tag {
		margin: 7px;
	}

	.bdtop {
		border-top: 1px solid #eee;
	}

	.bdbottom {
		border-bottom: 1px solid #eee;
	}

	.vcenter {
		display: flex;
		align-items: center;
	}
</style>
